AVRDUDE does not write flash - avr

Question

I'm having a problem with AVRDUDE. It does not even attempt to write the hex file to the AVR. In WinAVR there is no problem. (I can't use WinAVR, because I've got only the hex file.)
L:\>avrdude -c SAJAT -p t2313 -P COM1 -U flash:w:main.hex
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0x1e910a
avrdude: safemode: Fuses OK (E:FF, H:DF, L:E0)
avrdude done. Thank you.
avrdude.exe, avrdude.conf and the main.hex files are located in the same folder.
SAJAT is my version of the DASA programmer (different pin assignment), and this works fine. The target is ATtiny2313 with an external 12 MHz clock. I am using AVRDUDE 6.1 on Windows 7 64-bit.
Writing fuse bits works.
What is the problem here?

Answer 1

I've only uploaded a hex file, but I don't know if this will work with EEPROM files as well or not.
Step 1:
Create a simple program in WinAVR, like an LED toggle.
Name it as you like. I named it 2313.c
Step 2:
Compile it in WinAVR.
Now you have not only the 2313.c file, also the 2313.hex and other files as well.
Step 3:
Burn this into the target device with WinAVR. This is important for future steps. Don't close the program after burning is completed.
Step 4:
Rename the hex file you want to burn to your AVR to 2313.hex (myhex_to_burn.hex -> 2313.hex). Copy the renamed hex and overwrite the complied one with it. Now copy all these files (makefile, .hex, .c, ... etc.) where your AVRDUDE is located.
Step 5:
Open AVRDUDE. (Start -> cmd - > go to AVRDUDE location.)
Open WinAVR and select the first line at its Output window. You should find something like this:
avrdude -p attiny2313 -P com1 -c sajat –U flash:w:2313.hex
Copy it and paste it into AVRDUDE with right click and insert.
Step 6:
Prepare your target AVR for programing (connect it to the ISP programmer, power, etc.)
Press Enter.